*{
  box-sizing:border-box;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto;
}

body{
  background:#f5f5f7;
  min-height:100vh;
  margin:0;
}

.top-bar{
  position:relative;
  text-align:center;
  padding:22px 0;
}

.top-bar h1{
  font-size:26px;
  margin:0;
}

.back-arrow{
  position:absolute;
  left:24px;
  top:50%;
  transform:translateY(-50%);
  font-size:30px;
  cursor:pointer;
}

.app{
  width:520px;          /* ⬅ width badha di */
  margin:0 auto 40px;
  background:#fff;
  padding:32px;
  border-radius:24px;
  box-shadow:0 20px 40px rgba(0,0,0,.08);
  text-align:center;
}

.subtitle{
  color:#666;
  font-size:14px;
  margin-bottom:18px;
}

.controls{
  display:grid;
  gap:14px;
  margin:18px 0;
}

label{
  text-align:left;
  font-size:13px;
}

input, select{
  width:100%;
  padding:10px;
  border-radius:12px;
  border:1px solid #ddd;
  margin-top:5px;
}

.size-box{
  display:flex;
  gap:10px;
}

button{
  width:100%;
  padding:15px;
  background:black;
  color:white;
  border:none;
  border-radius:18px;
  font-size:16px;
  cursor:pointer;
}